I am a fan of Kicker door speakers. I have them in my doors and a 12" Pioneer subwoofer under the back seat. For my truck (2004 extended cab) I believe it's 5.25" for the front doors and I'm not sure what size goes in the back. With a little persuasion you can make a 6"x9" fit in the extended cab doors.

I am a fan of Kicker door speakers. I have them in my doors and a 12" Pioneer subwoofer under the back seat. For my truck (2004 extended cab) I believe it's 5.25" for the front doors and I'm not sure what size goes in the back. With a little persuasion you can make a 6"x9" fit in the extended cab doors.

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NBS Ext cabs take 5.25's up front. (Not sure on NNBS.) The front door holes are large enough to accept 6.5's up front without issue, but you'll be drilling new holes for your mount rings and doing some light fab work on the interior door panels so that the door panels have openings sufficient for the 6.5's if you go with them.

NBS Ext Cabs also take 4x6's in the rear. (Again, not sure on NNBS.) The rear door panels can take up to 6.5's easily enough if you're willing to do some shee metal cutting and custom interior door panel work. The shape of the rear opening on the interior panel is rectangular, so fab work for an opening for a round speaker that's larger than the interior door panel's opening is tall will be moderate (probably difficult for a novice) if the stock look is something one is trying to retain. A 6x9 might be a lighter job while retaining a stock look ... if you like how they sound. (I don't.)

NBS Ext cabs take 5.25's up front. (Not sure on NNBS.) The front door holes are large enough to accept 6.5's up front without issue, but you'll be drilling new holes for your mount rings and doing some light fab work on the interior door panels so that the door panels have openings sufficient for the 6.5's if you go with them.

NBS Ext Cabs also take 4x6's in the rear. (Again, not sure on NNBS.) The rear door panels can take up to 6.5's easily enough if you're willing to do some shee metal cutting and custom interior door panel work. The shape of the rear opening on the interior panel is rectangular, so fab work for an opening for a round speaker that's larger than the interior door panel's opening is tall will be moderate (probably difficult for a novice) if the stock look is something one is trying to retain. A 6x9 might be a lighter job while retaining a stock look ... if you like how they sound. (I don't.)

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I figured the front would accept a little bit larger speaker. I didn't bother there b/c circles are a bit harder to cut than squares... My 6x9s took a fair amount of cutting and I built a mounting plate for the speaker to sit in. None of this is really difficult, just time consuming really.

I figured the front would accept a little bit larger speaker. I didn't bother there b/c circles are a bit harder to cut than squares... My 6x9s took a fair amount of cutting and I built a mounting plate for the speaker to sit in. None of this is really difficult, just time consuming really.

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I agree that enlarging the door holes is easy and just takes time/patience. Making a clean revision to the interior door panels such that the entire speaker is exposed to the cab is another matter for people unaccustomed to such work ... and becomes more difficult if you're using odd shapes while trying to keep a stock look behind stock speaker grilles.

I'm almost positive 6 3/4 will fit in the NNBS. I've been working on planning out my system for my truck and have been looking at the JL Audio C5-653 for the front. Every place I've looked, including crutchfield says they fit in my truck and they're either 6 1/2 or 6 3/4. I can't remember off the top of my head. Should be the same size for the back as I've been looking at the C5-650 for the rear and everything I've heard and read says those will fit.

Verify it though and don't take my word for it. I'd be willing to bet on it for my own truck, but wouldn't spend someone elses money on that bet.

Iv'e replaced all of my speakers with 6.5 Kicker RS component speakers and they fit perfectly without any modification. Although, I kept the door panels on so I wasn't able to add my grilles without cutting out the existing ones built into the panels. I plan on getting kick panels this summer and having all of the grilles and interior accent pieces hydro dipped to match.

Hey guys I hate to use Burden33's thread for this, but y'all seem knowledgable. Is there a 4x6 size component out there that will handle a little power. I have 4x6 kickers installed but they r disconnected because they can't handle enough power to be turned up loud. So i just have some 6x9's on the back seat. Just wondering if anyone knew of a good set of 4x6 size.

Hey guys I hate to use Burden33's thread for this, but y'all seem knowledgable. Is there a 4x6 size component out there that will handle a little power. I have 4x6 kickers installed but they r disconnected because they can't handle enough power to be turned up loud. So i just have some 6x9's on the back seat. Just wondering if anyone knew of a good set of 4x6 size.

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dont worry about it but like everyone says it depends on how much power your looking for.

thanks for the infor guys soon as my truck comes out of the shop for warranty work ill be taking off my panels and sizing it up to see if i can get the 6 1/2 speakers in there. it looks like ill be running alpine type r since my parents shop is finally a dealer for alpine and its good advertisement